Understanding the electrochemical superiority of 0.6Li[Li1/3Mn2/3]O2-0.4Li[Ni1/3Co1/3Mn1/3]O2 nanofibers as cathode material for lithium ion batteries

摘要: Abstract Solid solution cathode materials 0.6Li[Li1/3Mn2/3]O2-0.4Li[Ni1/3Co1/3Mn1/3]O2 with different morphologies were synthesized by electrospinning and coprecipitation method respectively. The field-emission scanning electron microscope images verified the successful formation of nanofibers for nanoparticles showed larger specific surface area according to Brurauer Emmerr Teller procedure. X-ray powder diffraction patterns corresponding lattice parameter refinements that both samples can be indexed hexagonal α-NaFeO2 layered structure space group R-3m. And material prepared electrostatic spinning has a tight atomic arrangement in layer yet dimensions do not influence intercalation deintercalation lithium ion through interlayer. discharge capacity electrode is 302.3 mAh g−1 at 0.05 C initial columbic efficiency 76.2%, which are higher than 282.7 mAh g−1 68.2% electrode. also presented better cycleability rate capability, especially performed 126.6 mAh g−1 5 C, much 109.4 mAh g−1 step-by-step cyclic voltammetry revealed performs voltage platform enhanced energy density. excellent electrochemical performance ascribed conductivity superior diffusion ability impedance spectrum measurement.